This lens is loooong overdue and would likely sell like hotcakes, as did the current version. I was recently looking at Nikon and they have a new improved version of their 80-400 and the reviews are off-the-charts positive. The improved Canon would need zoom ring instead of push pull and preferably start at 80mm instead of 100mm to match Sigma and Nikon.

A big lens announcement would be a 1200F5.6 lens...... But I'll settle for an updated 400F5.6, it would be a lot easier to carry.

For such a 'big 'ens' I'd expect the announcement to be 'small', aimed mostly at professionals that might actually use this niche product.

If it is a significant lens, I'd think it is something coveted by many photographers, such as the 100-400 shown at the start of this thread, or maybe a new 50L. Somehow I think a 35L is not significant enough.

So based on the original info I'd say if anything is anounced, it's an 'L' telezoom, normal prime or quite possibly a WA zoom with a new range.

12-24mm f2.8L would be the important add-on to their lineup. Updates for the 35 f1.4L, 50 f1.2L and 85 f1.2L would be most welcome and within their zoom portfolio, I would love to see a new version of the 100-400.

WEX Photographic (the online retailer of the year since 2002 here in the UK) are offering 10% discount to existing customer on top of the £170 cashback (rebate) offered by Canon on the 16-35mm f2.8 L MkII USM. Is this a sign that the announcement is for the previously rumored 16-50mm L ?. It's the only lens with the double discount !.